OVI Files is part of Nokia's OVI umbrella services. There is online Data storage in cloud which is available from your mobile or PC, Mac.It is called "Anytime Files".Nokia offers upto 10 GB space for free.You need to just download OVI Files connector to your PC/Mac and set up online files with your OVI user id.

This way you can always store upto 10GB data on OVI Files cloud and also access files from your PC/Mac if it is running OVI connector and connected to internet. It'r very useful service in OVI.